IS 4919:1981 is the Indian Standard (BIS) for glossary of terms applicable to landscape and horticulture work. This standard provides a comprehensive glossary of terms used in landscape architecture and horticultural work. It aims to standardize the vocabulary used by architects, contractors, and horticulturists to prevent ambiguity in design, tender documents, and execution.
Glossary of terms applicable to landscape and horticulture work
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Tree Trunk Size Measurement | Defines 'Girth' as the circumference of a stem or trunk, but does not specify the height of measurement. | Specifies 'Caliper' (diameter) be measured 6 inches from the ground for trees up to 4-inch caliper, and 12 inches from the ground for larger trees. | ANSI Z60.1-2014 |
| Topsoil Quality | Defines 'Topsoil' qualitatively as 'The surface layer of soil, usually containing organic matter'. | Specifies quantitative parameters for pH, organic matter content (3-20%), particle size distribution, and low levels of contaminants and stones. | BS 3882:2015 (Specification for topsoil) |
| Shrub Sizing | Defines 'Shrub' based on its botanical characteristics (woody plant, multiple stems) without a standardized sizing method for trade. | Shrubs are measured and specified by height or spread, typically in standardized increments (e.g., 18-24 inches, 24-30 inches). | ANSI Z60.1-2014 |
| Mulch Application | Defines 'Mulch' as a material spread on the soil surface to conserve moisture, without specifying application details. | Professional best practice, often specified in project documents, calls for a layer depth of 2-4 inches (50-100 mm) and keeping it away from direct contact with tree trunks. | General Landscape Architecture Best Practices |
| Plant Condition | Defines general terms like 'Healthy' but without specific, measurable criteria. | Provides detailed criteria for good health and structure, including requirements for root systems (e.g., not root-bound), trunk condition (e.g., single leader for many species), and foliage. | AS 2303:2018 |